Backend:
- RmmHub with typed IRmmHubClient interface (AgentMetricsUpdated, AgentStatusChanged, CommandResultUpdated)
- JoinAgentGroup / LeaveAgentGroup for per-agent subscriptions
- AgentGrpcService now pushes to SignalR after every Heartbeat and CommandResult
- Program.cs maps /hubs/rmm
Frontend:
- useSignalR hook with exponential backoff reconnect (0s/2s/10s/30s)
- useGlobalSignalR: invalidates agents query on AgentStatusChanged
- useAgentSignalR: joins agent group, invalidates metrics/tasks on updates
- DashboardPage: live agent status updates via SignalR
- AgentDetailPage: live metrics/command results + connection status indicator
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
